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[C#] Type trouble, ReadProcessMemory w/pointer

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Spawnfestis
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Posts: 1746
Location: Pakistan

Posted: Wed Dec 24, 2008 12:08 pm Post subject: [C#] Type trouble, ReadProcessMemory w/pointer

I'm trying to read a dynamic address (pointer), but it wont let me due to this error:
You can only take the address of an unfixed expression inside of a fixed statement initializer.
So to my last retort I'm asking you guys, help is very appreciated. Sad

Code:

//C# Signature for the ReadProcessMemory() API
[DllImport("kernel32.dll", SetLastError = true)]
static unsafe extern bool ReadProcessMemory(
IntPtr hProcess,
IntPtr lpBaseAddress,
void* lpBuffer,
int dwSize,
out IntPtr lpNumberOfBytesRead
);

public unsafe void checkStatus()
{
if (ReadProcessMemory(ProcessHandle, (IntPtr)0x1094E428, &baseAddress, 4, out bytesout))
{
Mana_pool = baseAddress + 0x328;
textBox1.Text += Mana_pool;
}
}

///
/// Outcome:
/// Error 1 You can only take the address of an unfixed expression inside of a fixed statement initializer
///
///

http://pastebin.com/m68cc74f
^ Click there to see the code highlighted.

Thanks.
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&Vage
Grandmaster Cheater Supreme

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Joined: 25 Jul 2008
Posts: 1053

Posted: Wed Dec 24, 2008 12:40 pm Post subject:

textBox1.Text = Mana_pool.toString(); And I don't think that's how you're suppose to read a pointer with an offset...

BanMe
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Joined: 29 Nov 2005
Posts: 375
Location: Farmington NH, USA

Posted: Wed Dec 24, 2008 12:42 pm Post subject:

first off i dont code C# (i did but it sucked..)

so ignoring this lil fact ill proceed with proper code... ;}

Code:

public unsafe void checkStatus()
{
if (ReadProcessMemory(ProcessHandle, (IntPtr)0x1094E428, &baseAddress, 4, out bytesout))
{
char*Mana_Pool[255];
if(baseAddress)
{
if(ReadProcessMemory(ProcessHandle,(IntPtr)baseAddress + 0x328, &Mana_Pool,255,out bytesout))
{
if(strlen(Mana_Pool))
{
textBox1.Text += Mana_pool;
}
}
}
}
}

Zerith
Master Cheater

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Joined: 07 Oct 2007
Posts: 468

Posted: Wed Dec 24, 2008 12:50 pm Post subject:

BanMe wrote:

first off i dont code C# (i did but it sucked..)

so ignoring this lil fact ill proceed with proper code... ;}

Code:

Wow..eh, no pointers in C#, strlen() doesn't exist in C#.

Spawnfestis
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Posts: 1746
Location: Pakistan

Posted: Wed Dec 24, 2008 1:19 pm Post subject:

Wow okay, how does typecasting the Mana_pool variable help me here, the error is at the RPM line. I already fixed that before, by the way.. _________________ CLICK TO HAX MAPLESTORAY ^ !!!!

samuri25404
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Posted: Wed Dec 24, 2008 1:19 pm Post subject:

This is actually fairly simple.

Google for "C# fixed" for more information.

Code:

public unsafe void checkStatus()
{
fixed( byte *lpBase = &baseAddress ) {
if (ReadProcessMemory(ProcessHandle, (IntPtr)0x1094E428, lpBase, 4, out bytesout))
{
Mana_pool = baseAddress + 0x328;
textBox1.Text += Mana_pool;
}
}
}

should work. Though, I couldn't recreate the error, so I'm not 100% sure; been a while since I've done C# pointers.
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Spawnfestis
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Joined: 02 Nov 2007
Posts: 1746
Location: Pakistan

Posted: Wed Dec 24, 2008 1:32 pm Post subject:

samuri25404 wrote:

This is actually fairly simple.

Google for "C# fixed" for more information.

Code:

should work. Though, I couldn't recreate the error, so I'm not 100% sure; been a while since I've done C# pointers.

Getting this error

Code:

Error 1 Cannot implicitly convert type 'int*' to 'byte*'. An explicit conversion exists (are you missing a cast?)

At line

Code:

fixed (byte* lpBase = &baseAddress)

specific: &baseAddress

Thanks for the help, still trying to solve it although I'm toying with something else that I will have use for later on while someone breaks this problem. ^^
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samuri25404
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Posted: Wed Dec 24, 2008 1:55 pm Post subject:

lol.

Code:

fixed( byte *lpBase = (byte*)&baseAddress )

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Spawnfestis
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Posts: 1746
Location: Pakistan

Posted: Wed Dec 24, 2008 1:57 pm Post subject:

samuri25404 wrote:

lol.

Code:

fixed( byte *lpBase = (byte*)&baseAddress )

lol

Code:

Error 1 The right hand side of a fixed statement assignment may not be a cast expression

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samuri25404
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Posted: Wed Dec 24, 2008 2:00 pm Post subject:

Sigh.

Code:

fixed( void *lpBase = &baseAddress )

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Spawnfestis
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Posted: Wed Dec 24, 2008 2:26 pm Post subject:

samuri25404 wrote:

Sigh.

Code:

fixed( void *lpBase = &baseAddress )

Seems to be working now, but it returns the wrong value.
http://pastebin.com/m586c49c6

Ahhh, I'm so out of the ideas. Also I'm not really familiar with reading pointers so fuck. Confused

Thanks for the help though.
Just trying to read address 0x1094e100 with offset 0x328, if you have any better code to do this.. then that'll be fine too. :_:
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samuri25404
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Posted: Wed Dec 24, 2008 3:45 pm Post subject:

Code:

int BytesRead = 0;
byte[] Data = new byte[4];
fixed( byte* lpBase = &Data[0] ) {
if( RPM( ProcessHandle, (IntPtr)0x1094E100, lpBase, 4, out BytesRead ) && BytesRead == 4 ) {
int Address = BitConverter.ToInt32( Data );
Address += 0x328;
fixed( byte* lpData = &Data[0] ) {
if( RPM( ProcessHandle, (IntPtr)Address, lpData, 4, out BytesRead ) && BytesRead == 4 ) {
ManaPool = BitConverter.ToInt32( Data );
textBox1.Text += ManaPool.ToString();
}
}
}
}

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Spawnfestis
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Joined: 02 Nov 2007
Posts: 1746
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Posted: Wed Dec 24, 2008 3:55 pm Post subject:

samuri25404 wrote:

Code:

Troublesome and a pain in the ass, but this still doesn't return the right value. It returns 622883621 now.

Code:

byte[] Data = new byte[4];
fixed (byte* lpBase = &Data[0])
{
if (ReadProcessMemory(ProcessHandle, (IntPtr)0x1094E100, lpBase, 4, out bytesout))
{
int Address = BitConverter.ToInt32(Data,0);
Address += 0x328;
fixed (byte* lpData = &Data[0])
{
if (ReadProcessMemory(ProcessHandle, (IntPtr)Address, lpData, 4, out bytesout))
{
Manapool = BitConverter.ToInt32(Data,0);
textBox1.Text += Manapool.ToString();
}
}
}
}

No error, so shit. Fuck. :<
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hcavolsdsadgadsg
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Posts: 5801

Posted: Wed Dec 24, 2008 9:35 pm Post subject:

Code:

[DllImport("kernel32.dll")]
static extern bool ReadProcessMemory(
IntPtr hProcess,
IntPtr lpBaseAddress,
byte[] lpBuffer,
int dwSize,
int lpNumberOfBytesWritten
);

Process[] p = Process.GetProcessesByName("tutorial");
byte[] buffer = new byte[4];

private void button1_Click(object sender, EventArgs e)
{
ReadProcessMemory(p[0].Handle, (IntPtr)0x0045CC34, buffer, buffer.Length, 0);
uint butts = BitConverter.ToUInt32(buffer, 0);
butts += 0x00;
textBox1.Text = Convert.ToString(butts, 16);
}
}

what's so hard? i used the CE tutorial, it spits out the right value.

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